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(No Model.)' I

W. J. KAYSER.' GHIMNEY GOWL.

No. 486,830. 7 Patented Nov. 22,1892.

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' 6% @l/wwww A it UNITED STATES PATENT OFFICE,

WILLIAM J. KAYSER, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO LOUIS HOFFMANN AND WILLIAM BAUR, SAME PLACE.

CHlMNEY-COWL.

SPECIFICATION forming part of Letters Patent No. 486,830, dated November 22, 1892. Application filed March 5, 1892. Serial No. 423.838. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM J. KAYSER, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee, and in the State of Wisconsin, have invented certain new and useful Improvements in Chimney-Cowls; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to improvements in chimney-cowls; and it consists in the matters hereinafter described, and more particularly pointed out in the appended claims.

The object of my said invention is to provide an improved form of chimney-cowl of such construction that it will effectually exclude all external currents of air which would tend to impair the draft and at the same time will operate to greatly increase the strength of the upward draft so as to insure the proper operation of the device. v

In the accompanying drawings, illustrating my invention, Figure l is a side elevation, partly in section, of a chimney-cowl constructed in accordance with my invention. Fig. 2 is a horizontal sectional View of the same, taken on line 2 2 of Fig. 1.

In said drawings, A represents a vertical cylindrical pipe adapted to be placed over and to register with the opening in the upper end of a chimney, the upper end of said pipe being preferably notched, as shown at a a.

B represents a frustum-shaped hood, preferably arranged with its larger end downward and about on a level with the points of the notched portion of the said pipe A, said frustum-shaped hood being arranged concentrically above the upper end of said pipe, the small end of said hood being preferably of substantially the same diameter as the tube A. A second frustum-shaped member 0 is arranged below the hood B, said latter member being arranged with its small upper end fitted snugly around the tube A below the notched upper portion thereof. Suitable vertically-arranged supporting-strips D D, preferably of thin metal, are arranged upon the upper surface of the member 0 and extend upwardly and are attached to the lower sur face of the hood B, so as to support the same in position above the top of the pipe A, these supporting-pieces being preferably formed with laterally-bent upper and lower edges 61 d, by means of which they may be attached to the respective surfaces of the hood B and the member 0 by suitable bolts or rivets d d. The supporting-strips D D are preferably formed with their inner edges D D inclined outwardly toward their upper ends, as shown, said strips being also arranged so as to occupy positions radial to the hood B, as illustrated more particularly in Fig. 2.

Above the hood B is provided a cone-shaped cap E, closed at its apex and supported concentrically above the hood B by means of supporting-strips F F, also provided with laterally-bent upper and lower edges ff, adapted to be secured by rivets or bolts f'f' to the respective surfaces of the hood B and the cone E, so as to support the same in position. The inner edges of the supporting-pieces FF are also preferablyincliued outwardly toward their upper ends, as illustrated at F F in Fig. 1.

The operation of my improved device is as follows: Currents of air, which strike the cowl in a horizontal direction or obliquely from above, are deflected upwardly by impinging against the upper surfaces of the conical cap E, the hood B, and the frustumshaped member (I in an obvious manner. By the construction of the'upper end of the pipe A with the notches a a, formed therein, a larger outlet for the currents of air will be formed at the extreme upper end of said pipe than at the lower ends of said notches a a, and the tendency of the said currents will consequently be upward; also, by the construction of the supporting-strips D .D with the outwardly-inclined inner edges the area of the outlet for said currents of air between the upper ends of the said supports and the outside of the pipe A will obviously be increased in proportion to the outward inclination of said inner edges. By this construction the portions of the currents of air which impinge against the surface of the pipe A, being deflected laterally thereby, will be permitted to pass outwardly between the upper ends of the supports D D and the surface of said pipe, while the portions of said currents which pass between adjacent points of the notched upper end of said pipe will obviously be given an upward direction, so as to cause them to pass up through the opening in the hood B and into the space between said hood and the conical cap E. By the outwardly inclined construction of the inner edges of the supports F F a larger outlet is afforded at the upper part of the space between the cap E and the top of the hood B than at the lower portion of said space, so that said currents are free to pass out just below the lower surface of said cap.

It will thus be seen that the construction of all of the parts of the device tends to materially increase the upward tendency of the currents of air and to prevent any downward direction of any portion of said currents, so that all liability of the draft of the chimney being impaired is obviated and a much strongerupward draft of air therein insured, ample outlet being afforded for the ascending currents of air from the chimney as well as for the currents of air which impinge against the several portions of my improved cowl.

I find that chimney-cowls constructed as herein described operate satisfactorily to produce a strong upward draft through the flues of a chimney, no matter at what angle the currents of external air mayimpinge against the cowl, and that a current of air striking squarely against the top of the cap E in a vertical direction will not affect the draft of the chimney injuriously, but, on the other hand, will operate to increase the strength of the upward currents of air therein.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. A chimney-cowl comprising a verticallydisposed pipe provided with a series of notches in its upper end, a frustum-shaped hood open at its upper end, located concentrically above the upper end of said pipe, and a conical cap or cover located concentrically above the said hood, substantially as described.

2. A chimney-cowl comprising a verticallydisposed pipe provided at its upper end with a series of V-shaped notches, a frustu m-shaped hood located concentrically above the upper end of said pipe, said hood being open at its top, a second frustum-shaped member fitted around the pipe below the said hood, radiallydisposed supports extending from the surface of the said lower member and adapted to support the said hood in position, and a conical cap or cover located concentrically above the opening in said hood, substantially as described. I

3. A chimney-cowl comprising a verticallydisposed pipe having a series of V-shaped notches in its upper end, a frustum-shaped member fitted around said pipe below the lower ends of said notches, afrustum-shaped hood open at its top and arranged concentrically above the upper notched end of said pipe, and radially-disposed supporting-strips extending from the upper surface of the firstmentioned frustum shaped member and adapted to support the said hood in position above said pipe, said supporting-strips being constructed with their inner edges inclined ou twardly toward the top, substantially as described.

4'. A chimney-cowl comprising a verticallydisposed pipe provided with a series of V- shaped notches in its upper end, a frustumshaped member fitted around said pipe below the said notches, a frustum-shaped hood located concentrically above the notched end of said pipe, a conical cap or cover arranged concentrically above the said hood, and radiallydisposed supports for said hood and said cap, provided with outwardly-inclined inner edges, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of Wisconsin, in the presence of two witnesses.

WILLIAM J. KAYSER.

Witnesses:

J OHN E. MILES, H. G. UNDERWOOD. 

